Log saw



June 24 1924- J. A. SWENSON LOG SAW 3 Sheets-Sheet 1 June 24 1924.

J. A. SWENSON v LOG sAw Filed Nov. l. 1.921 3 Sheets-Sheet, 2

June 24., 1.924..- 1,499,198

J. A. SWENSON -LOG SAW Filed Nov. 1 1921 s sheets-sheen 15 N r1 A':Jn/manioc Patented June 24, 1924.

J'NAS A. SWENSON, OF SPRINGFIELD, SOUTH DAKOTA. A

me SAW.v

'Application mea Nbvember 1, 192i. serial No. 512,035.

To all whom t may concern: i

Be it known that JoNAsA. SwENsoN, a

citizen of the United States of America, re-

siding at Springfield, in the county of Bonhomme and State of SouthDakota, has

, invented new and useful Improvements in lLog Saws, of which thefollowing, is aspecification.

The object of the invention is to provide a relatively simple andeflicient sawing ma` A, chine especially designed for lumbering purposesand adapted for. cutting down or` felling timber and reducing ythejsameto commercial or portable form; and with this object in view theinvention `consists in a construction and combination of parts of whicha preferred embodiment is shown in the accompanying drawings, whereinFigure 1 is a side view of a machine embodying the invention arrangedfor use vin cutting up felledtimber.

Figure 2 is a similar View showing the machine arranged for use incutting rela` tively small logs into portable lengths.

Figure 3 is a similar ,View showing the parts arranged for fellingtimber. y,

Figure 4 is a plan view of the vmechanism as shown in Figure 3. y l

Figure 5 is a front end viewof the machine. i Figure 6 is a detail viewin perspective of the independent saw guide used in felling timber. i y.f

Figure 7 is a view of'one ofjthefmachine carried saw guides or hangers.t

Figure 8 is a view of theretainerby which the jack lsection of the frameis heldv in its operative position. y y The frame 10 of the machinewhich oonsists essentially of substantially parallel side beams issupported at its rear end by ground wheels 11 normally mounted upon the'spindle portions of a transversey axle l2 but adapted for selectivemountingupon alter,- native spindles-13 carried by a yoke 14 when,

\ as shown inl Figure l in full lines the machine is adapted for'use incutting logsL of large diameter which are resting on the ground, as ameans of minimizingthe longitudinal vibration of the frame of which theforward end in that use of-the device issupported by the log to which itmay be an-` chored by spikes 15 driven through `suitable eyes 16. f

Th'eframe adjacentto its",rearfend` and thereforeabove thesupportfadvorded by the ground wheels carries amotor 17 ofthe'lexplosive or other preferred type for actuat-` ing. a drive shaft,18 illustrated n as ofthe cranked type and carrying ily wheelsy 19 andVa belt pulley 20 traversed by'a belt`21 which also extends around yadrive pulley Y22 hav-l ing a crank pin 23 operating in the slot 24 ofanoscillatory saw. Aactuating. arn`f1 25.`

This saw actuating arm is pivoted as.at .26V upon a suitable vuprightframe 27 supported by the main frame of the machine and is'connected atits lower end, for example by a clipv 28` or its equivalent with a sawcarrier 29 give adapted for reciprocatoryy movement to a correspondingmotion to the saw bladevv 30;

In the construction and*` arrangement ofthe parts illustrated in Figure1the saw blade;V Si

is rigidly attachedcby means of bolts 31 to the saw carrierywhichyoperates in av guide hanger 32 depending from the main frame,

and the necessary downward pressuretojini-4 duce an edective feeding ofthesaw through'A the log "indicated at 33 is supplied by'k 'a ten-`sioned feeding device consisting forheirample of ya spring 34andvchainj35 connectingpthe heel 36y of the saw carrier with theupper'end of the ysaw actuating arm 25. Obviously any desired tension may beapplied tothe: spring to effect the desired feeding' pressure;

Inlconnection 'withthe beltj21 there is arranged aitightener 37consisting'of anarmf oa'rrying'a roller 38 and movable by means of ahand lever 39 operatingjin relation ltoa toothedseg'ment 40.

`When as illustrated in Figures Sand the machine is to be used as ameansfor cut'- tingdown or felling standing tin'iber the:

saw blade 30`isf turned to operate in a hori-J zontal instead ofavertical plane and isconl" nected with the carrier by meansfof an eX-tensionbari41ldesigned to dispose the blade beyond the frontend oftheframe, andin this posit-ion of the partsthe extension bar is carriedlthrough a 1guide 42 forming a part of a hanger 43 depending froml themain frame of the machine and also through a' supplemental guide 44whichis adapted to beanchored by meansof stakes orpins y45 tothe groundin advanceofthe machine frame, while feedingymovement is imparted to thesaw by means of a chain 46 anchored to the ground by a'stake 47 ory itsequivalent and a spring 48 connected with the fonward ,y

, end of the extension bar 41 as shown clearly in Figure 4.o The guide42 andfhanger43 are removed when ,the ymachine isnot er1-h Y carrying aroller 60 gagedin felling timber. A plate 49 is employed as theconnection between the rear end of the extension bar and the carrier,and said extension bar is furtherpivoted as 'at 50 to said plate topermit of lateral or horizontal swinging movement as the saw is fedthrough the stock or trunk of the standing timber as indicated at 51.

order that the machine may also be adapted 'for use in 'cutting uplighter timber such 'as the limbs. of trees which cannot be )p'e'ratedVupon. "conveniently whileV lying` fthe ground, the side beams ofthemain frame of the. machine Aare 'provided Ywith a jack etensio'n 52shown `inFigures l, 3 and 4in norinal Yposition in alignment with thebodyport-ions of said beams hinged thereto alsfindic'ated at 53ft'oadapt them to be swung toannpright o'r 'supportingposition asindi'catefd Yin gFig'ure '2. In the adjusted Apositin the jack extensionis held by a brace rod 5 4:l 'provided at vits eitremity with a hook 55for'engaging 'a ltransverse rod or pin 56.

` .order thatthe saw blade when the machine is'u'sed-forV sawingcomparatively light logs orfbranches maybe held in the elevated positionin the Yintervals between the arrangement ofthe logs in position forcutting there is. employed aretainer Vor lifter 57 consistingfofa rockermounted as at 56 on the main frameandfprovided with an arm 59 i ofrubber or other yielding'material for engagement by the' toothed edge ofthe sawblade and Apermanently arranged 'in the .path thereof. The rockeris of. bell-crank form with ythe upper vor. operatarm 61 connected by arod 62 to the hand lever3'9 which as hereinbefore described operates inconnectionwith theV segment 40, having a-'suitable latchyfor'engaging'the toothed Apieriphery thereof, a-nd carrying the beltti'ghtener 37 by which the .operation of the saw orthe starting andstopping Vof the saw operatingmeans are effected. Obviously7 whenthe'lever 39 is moved to the rear to loosen the (drive belt 21 thepulley by which c moti'nis communicated'thereto and which is actuatedvby the motor will turn loos-ely therein, whereas upon moving the leverforwardand locking it in position with the belt under tension, motionwill be communicated to the saw blade carrier.

vBy attaching the Vsaw blade lifter Vconsisting vas above described ofthe rocker and bladefsuppGrting roller 6() to the starting lever 39itwill be obvious that whenthe lever is moved to 'start the machine byapplying tension to the drive belt the blade supportingroller 'will belowered as indicated in Figure 2 and thereby removed from contactVwith'the toothed edge of the saw al-v though arranged in the paththereof, whereas when the starting lever is moved in -the oppositedirection to stop thesaw the rocker will beactuate'd'to raise the"roller 60 and thereby lift the saw to the dotted line positionindicated in Figure 2. The lower end of the jack member is preferablyprovided with a suitable metallic shoe 65 and a log rest 66 is arrangednear the upper end thereof for supporting logs as indicated at 67 inposition for cutting by the sawwhen lowered from the dotted linelpositionindicated in Figure 2 through the starting movement of the lever39. When the saw blade has passed through thel log it will be caughtbythe roller 60 and hence prevented from coming in contact with theground or 'other objects which might injure the cutting edge thereofduring the interval between the severance of the log and the stopping ofthe saw by the reverse operation of the starting lever 39. When thelatch of the'leve'r 39V is disengaged from the segment to relieve thetension on'the drive belt the spring 63 which issupplemented by thechain 64 to form a connection 'with 'the lever 39 serves to yieldinglyhold the latter into position to support the saw in the dotted lineposition indicated in Figure 2. VSince it is necessary onlyin the sawingof small timber, such as that illustrated at 67, to catch the saw bladeafter Vit has completed a Ycut and raiseit tol bearing straps 58 inwhich the rocker -58de mounted and in which Vthe rocker may beV movedlongitudinally, the bearing-straps 58 being secured to the frame 10 onthe top thereof.

When the j ack extension 52 is arranged in alignment with the frame, asin Figure l, it is designed to be held in such position by'A springlatch plates 52 adapted for engagement with pins 52'r1 mounted on theside bars of the frame. Y

Moreover in starting the saw Vboth o Y logs supported by the jackmember. as shown in Figure 2 or upon the ground as indicated in Figurel, a movable saw guide 68 lmay be employed, the same consisting of asuitable arm pivoted at 69 and carrying a kerfed or grooved head orblock 7() to straddle the rear edge or back of the saw as shown inFigure 2. This guide prevents chatteringrof the saw blade as the cuttingis started, but after the saw has penetrated the log to any considerableextent it will be guided thereby independently of the block 7 O'whichmay then dropY free as indicated in Figure l. Y

From the foregoing description it will be 1. A sawing machine having amotor carn rying frame provided with rear supporting wheels and havingits forward end provided with a jack member adapted for angular positionwith reference to the frame to support the latter at the forward end orextension into the same plane as the frame to support the frame when thejack member is rested on top of a felled log, a saw carrier mounted forreciprocating movement in longitudinal relation with the frame, andmeans for communicating motion to the carrier.

2. A sawing machine having a motor car-` rying frame provided with rearsupporting wheels and having its forward end provided with a jackmember` adapted vfor angular position with reference to the frame tosupport the latter at the forward end or eXtension into the same planeas the frame to support the frame when the jack member is rested on topof a felled log, a saw carrier mounted for reciprocating movement inlongitudinal relation with the frame, means for communicating motion tothe carrier, the jack member consisting of a hinge extension of theframe, and means for securing the jack member either in angular relationor in aligned relation with the frame.

3, A sawing machine having a motor carrying frame provided withsupporting wheels at its rear end, a jack member supporting the frame atthe forward end, a saw carrier mounted for reciprocatory movement inlongitudinal relation with the frame, means for communicating motion tothe carrier, the jack member having means for supporting a log to becut, a bell crank retainer mounted on the main frame and provided with ayielding roller for disposition below the cutting edge of a saw mountedin the carrier, and means for actuating said retainer.

4. A sawing machine having a motor carrying frame provided withsupporting wheels at its rear end, a jack member supporting the fra-meat the forward end, a saw carrier mounted for reciprocatory movement inlongitudinal relation with the` frame, means for communicating motion tothe carrier, the Jack member having means for supporting a log to becut, a bell crank retainer mounted on the main frame and provided with ayielding roller for disposition below the cutting edge of a saw mountedin the carrier, and means for actuating said retainer, said retainerbeing laterally movable out of obstructing relation with the saw.

- 5. yA sawing machine having amotor carrying frame provided at itsfront end with a jack member having a log rest, a saw carrier mountedfor reciprocatory movement in longitudinal relation with the `frame andcarrying a saw blade for movement in a path transverse to the logsupporting/means for communicating reciprocatory movement to the sawcarrier including driving and driven pulleys and a belt connecting thesame, a starting lever carrying :i belt tightener for applying tensionto the belt, and a c saw blade lifter having a rocker provided with asaw support arranged in the path of the'cutting edge ofthe saw blade andoperatively connected with said starting lever.

6. A sawing machine having a motor carrying frame provided at its frontend with a jack member having a logrest, a saw carrier mounted forreciprocatory movement in longitudinal relation with the frame andcarrying a saw blade for movement in a path transverse to the logsupporting means for communicating reciprocatory movement to the sawcarrier including driving' and driven pulleys and a belt connecting thesame, a starting lever carrying a belt tightener for applying tension tothe belt, and a saw blade lifter having a rocker provided with a sawsupport arranged in the path of the cutting edge of the saw blade andoperatively connected with said starting lever, the saw blade beingyieldingly fed in the directio-n of its cutting movement. f 7. A sawingmachine having a motor carrying' frame provided at its front end with ajack member having a log rest, a saw cai'- rier mounted forreciprocatory movement in longitudinal relation with the frame andcarrying a saw blade for movement in a path transverse to the logsupporting means for communicating reciprocatory movement to the sawcarrier including driving and driven pulleys and a belt connecting thesame, a starting lever carrying a belt tightener for applying tension tothe belt, and a saw blade lifter having a rocker provided with a sawsupport arranged in the path of the cuttingedge of the saw blade andoperatively connected with said starting lever, the saw blade beingyieldingly fed in the direction of its cutting movement, and thestarting lever having a spring connection for moving the same in thebelt loosening 'jack member having a log rest, a saw carrier mountedforv reciprocatory movement in longitudinal relation with the frame andcarrying a saw blade for movement in a for communicating reciprocatorymovement tothe saw carrier including driving and driven pulleys and abelt connecting the kpath transverse to the log supporting means tion ofits ci'itting movement, and the sart- Y ingl lever having a springconnection for movin rthe saine in the belt loosening direction', Jfietension oi tlie last named Connection being in excess of that of the sai feeding means.

9. A sawing maeliine having a motor carrying 'frame provided at itsJiront end with a )aok member aing a log rest, a saw carrier mounted for'ieciprocatory movement in longitudinal relation with 'the frame 'andcarrying a. sawblade for movement in a pali transverse o the logsupporting means for communicating reciproeatory movement to the sawVcarrier including driving and driven pulleys andra belt connecting thesame, a starting lever cairying a belt tiglifsener for applying tensionto the belt, and a saw blade lifter having a roeker provided Witli" asawfsupport arranged in the path of tlie cutting'- edge' oiftlie sawblade and operatively conneoed Willi said starting4 lever, the sawsupport consisting of a soft surfaced roller.

ln testimony Wliereof he alixes lns signature, Y

' JONAS A. SWENSGN;

